• Quick Method
  • 300-150-100-75-60-50-42-37-33-30...
• 300 Method
  • 300 divided by the number of large squares
• 1500 Method
  • 1500 divided by the number of small squares
• 6-Second Method (for irregular rhythms, e.g., atrial fibrillation)
  • Count the number of QRS complexes in 6 seconds (30 large squares) and multiply by 10
• 3-Second Method (for irregular rhythms, e.g., atrial fibrillation)
  • Count the number of QRS complexes in 3 seconds (15 large squares) and multiply by 20